> For the complete documentation index, see [llms.txt](https://docs.dnscontrol.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dnscontrol.org/language-reference/top-level-functions/ip.md).

# IP

Converts an IPv4 address from string to an integer. This allows performing mathematical operations with the IP address.

{% code title="dnsconfig.js" %}

```javascript
var addrA = IP("1.2.3.4")
var addrB = addrA + 1
// addrB = 1.2.3.5
```

{% endcode %}

{% hint style="info" %}
**NOTE**: `IP()` does not accept IPv6 addresses (PRs gladly accepted!). IPv6 addresses are simply strings:
{% endhint %}

{% code title="dnsconfig.js" %}

```javascript
// IPv4 Var
var addrA1 = IP("1.2.3.4");
var addrA2 = "1.2.3.4";

// IPv6 Var
var addrAAAA = "0:0:0:0:0:0:0:0";
```

{% endcode %}